WO2012070564A1 - 糖ペプチドアレイ - Google Patents
糖ペプチドアレイ Download PDFInfo
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- WO2012070564A1 WO2012070564A1 PCT/JP2011/076889 JP2011076889W WO2012070564A1 WO 2012070564 A1 WO2012070564 A1 WO 2012070564A1 JP 2011076889 W JP2011076889 W JP 2011076889W WO 2012070564 A1 WO2012070564 A1 WO 2012070564A1
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- glycopeptide
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/68—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving proteins, peptides or amino acids
- G01N33/6803—General methods of protein analysis not limited to specific proteins or families of proteins
- G01N33/6845—Methods of identifying protein-protein interactions in protein mixtures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/68—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving proteins, peptides or amino acids
- G01N33/6803—General methods of protein analysis not limited to specific proteins or families of proteins
- G01N33/6842—Proteomic analysis of subsets of protein mixtures with reduced complexity, e.g. membrane proteins, phosphoproteins, organelle proteins
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/543—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals
- G01N33/54353—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals with ligand attached to the carrier via a chemical coupling agent
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/543—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals
- G01N33/54393—Improving reaction conditions or stability, e.g. by coating or irradiation of surface, by reduction of non-specific binding, by promotion of specific binding
Definitions
- the present invention relates to a glycopeptide array capable of detecting the binding between a detection target substance and a glycopeptide.
- proteomics involves the qualitative and quantitative measurement of gene activity by detecting and quantifying expression at the protein level, rather than at the gene level. It also includes studies of events that are not encoded by genes such as post-translational modifications of proteins and interactions between proteins.
- sugar chains have attracted attention as the third chain in the living body. In particular, research on the relationship with cell differentiation, canceration, immune reaction, fertilization, and the like has continued, and attempts to create new drugs and medical materials are continuing.
- sugar chains are receptors for many toxins, viruses, and bacteria, and are also attracting attention as cancer markers. Recently, sugar chains interact with amyloid proteins that are thought to cause cancer cell metastasis and Alzheimer's disease. Has also been reported.
- sandwich method as a method generally used in detection and quantification of specimens such as proteins.
- an antibody primary antibody
- a target protein is trapped by an insolubilized antibody
- a labeled antibody secondary antibody
- the protein is quantitatively measured by measuring the label (see, for example, Patent Document 1).
- this method for example, when trying to detect a large amount of proteins at a time, such as a protein chip, multiple types of antibodies that do not compete with each target protein are required. It contains many problems to be solved.
- a protein-capturing molecule (hereinafter also referred to as a capturing molecule) on a substrate, it reacts with another protein (corresponding to an antigen in the case of an antigen-antibody reaction) on the surface as in the sandwich method, for example.
- another protein corresponding to an antigen in the case of an antigen-antibody reaction
- a labeled protein is reacted and finally detected by a detector or the like, a protein other than the molecule, that is, an antigen or a labeled protein is immobilized on a portion where the capture molecule is not immobilized.
- S / N ratio signal-to-noise ratio
- the adsorption inhibitor is coated after immobilizing the primary antibody, it may be coated on the immobilized protein, and there is a problem that it cannot react with the secondary antibody. Therefore, there is a demand for a biochip that does not have an adsorption inhibitor coating step after immobilization of the primary antibody and has a small amount of nonspecific adsorption of a physiologically active substance.
- Patent Document 2 describes a method in which a specific immobilizing substance is bonded to a fine hole formed in a substrate.
- the immobilization substance is an antibody
- the amino group terminal N terminal
- the antigen binding site may not function sufficiently.
- the applicant of the present application used a bioassay polymer compound capable of immobilizing various physiologically active substances by suppressing nonspecific adsorption / binding of biomolecules without coating an adsorption inhibitor, and the same.
- a base material was developed (Patent Document 3).
- the surface binds a unit having a phosphorylcholine group for suppressing nonspecific adsorption of biomolecules, a unit having a hydrophobic group for binding to the base material, and a target substance.
- the polymer is coated with a polymer compound containing three units of a unit having a primary amino group, and the target substance is formed based on the bond between the primary amino group of the polymer compound and the aldehyde group in the target substance. It can be fixed to the material.
- Non-Patent Document 1 discloses that a glycopeptide is produced by a chemical reaction in which an amino group contained in a glycopeptide is reacted with a glass substrate surface activated with N-hydroxysuccinimide (NHS) ester to form an amide bond.
- An array immobilized on a glass substrate is described.
- a glycopeptide array is produced by such a method, since there are a plurality of reaction points with respect to the substrate in the glycopeptide, it is difficult to control the orientation of the immobilized glycopeptide. There are problems of contamination and nonspecific adsorption of the detection target substance to the substrate.
- the present invention has been made in view of such a situation, and an object of the present invention is to provide an array on which glycopeptides useful for detecting the binding between a substance to be detected and a glycopeptide are immobilized.
- a further object of the present invention is to provide an array on which the glycopeptide is immobilized, which can suppress non-specific adsorption / binding of a substance to be detected without coding an adsorption inhibitor.
- a glycopeptide in which a molecule having a carbonyl group is bonded to the peptide portion has a primary amino group efficiently via the carbonyl group. It has been found that it can be immobilized on a substrate coated with a polymer compound containing units.
- the present inventors have used a substrate coated with a polymer compound comprising a unit having a primary amino group, a unit for retaining hydrophilicity, and a unit having a hydrophobic group as a substrate for a glycopeptide array.
- glycopeptide can be efficiently immobilized and non-specific adsorption / binding of the detection target substance can be effectively suppressed, and the present invention has been completed.
- the present invention provides the following inventions.
- the polymer compound in the substrate further comprises a unit having a phosphorylcholine group and a unit having a hydrophobic group.
- the array according to (2), wherein the polymer compound is represented by the following general formula [1].
- R1, R2 and R3 represent a hydrogen atom or a methyl group
- R4 represents a hydrophobic group
- X represents an alkyleneoxy group having 1 to 10 carbon atoms
- p represents an integer of 1 to 20
- p represents When X is an integer of 2 or more and 20 or less, the repeated Xs may be the same or different
- Y is a spacer containing an alkylene glycol residue
- Z is an oxygen atom
- Y is the following general formula [2] or [3].
- a method comprising the step of: (13) The method for using the array according to any one of (1) to (11), wherein a test material is brought into contact with a glycopeptide in the array, and binding between the glycopeptide and the test material is detected. A method for detecting that the test material has an ability to bind to the glycopeptide. (14) The method of using the array according to any one of (1) to (11), wherein a test material is brought into contact with a glycopeptide in the array, and binding between the glycopeptide and the test material is detected. A method for detecting the presence of a substance having an ability to bind to the glycopeptide in the test material.
- the glycopeptide array of the present invention it is possible to efficiently detect the interaction between the substance to be detected and the glycopeptide.
- this glycopeptide array by using a substrate coated with a polymer compound containing a unit having a primary amino group, a unit for maintaining hydrophilicity, and a unit having a hydrophobic group, A glycopeptide can be immobilized and non-specific adsorption / binding of the detection target substance can be suppressed.
- the glycopeptide array of the present invention is immobilized via a carbonyl group artificially introduced into the glycopeptide, the carbonyl group can be located at any location that does not affect the interaction between the detection target substance and the glycopeptide.
- the present invention is an array of glycopeptides in which a glycopeptide is immobilized on a substrate, and the glycopeptide has a molecule having a carbonyl group bonded to the peptide portion, and the substrate has a primary amino group.
- a glycopeptide array usually refers to an array in which a plurality of types of glycopeptides are immobilized at a plurality of locations on a substrate.
- a glycopeptide array refers to a single type of glycopeptide as a substrate. That are immobilized at only one location, those that have multiple types of glycopeptides immobilized at only one location on the substrate, and those that have a single type of glycopeptide immobilized at multiple locations on the substrate. Including those that are.
- the glycopeptide array of the present invention can be used for detecting the binding between a substance to be detected and a glycopeptide.
- a substance to be detected for example, clinical examination, prognosis, drug effect determination, vaccine, early detection, immunological prevention, immunization It is useful for medical treatment, safety evaluation of food and agricultural chemicals, home medical care, remote medical care, etc.
- Examples of the “carbonyl group” in the molecule having a carbonyl group used in the present invention include a ketone group and an aldehyde group.
- the molecule having a carbonyl group may be bound to the N-terminus or C-terminus of the peptide portion of the glycopeptide, or may be bound to other sites, preferably at the N-terminus or C-terminus. Are combined.
- a glycopeptide when the peptide chain is extended from the C-terminal amino acid supported on the solid phase resin to the N-terminal side (in the case of a regular method), it is possible to introduce a molecule having the carbonyl group at the N-terminus.
- the peptide chain incompletely elongated is not immobilized on the base material because the N-terminal is capped during the synthesis, and only the peptide chain extended to the full length is immobilized on the base material.
- numerator which has the said carbonyl group in N terminal there exists a purification effect of the peptide chain extended to full length.
- the substrate in the glycopeptide array of the present invention is coated with a polymer compound containing a unit having a primary amino group.
- the polymer compound further comprises a unit for maintaining hydrophilicity and a hydrophobic property. It is preferable to include a unit having a group.
- the unit for maintaining hydrophilicity plays a role of suppressing physical adsorption (nonspecific adsorption) of the detection target substance to the substrate, and the unit having a hydrophobic group is a polymer compound. Each plays a role of bonding to the substrate.
- the unit having a primary amino group contained in the polymer compound of the present invention is not particularly limited in structure, but as represented by the structural unit on the right side of the structural unit of the following general formula [1], A structure via a spacer Y containing a (meth) acrylic residue and an oxylamino residue is preferred.
- Z is an oxygen atom
- Z is NH
- Z is NH (C ⁇ O) NH
- NH (C ⁇ S) NH in the case of a thiosemicarbazide
- n is originally a natural number, but may be expressed as a composition ratio of each component.
- the structure of the spacer Y containing an alkylene glycol residue is not particularly limited, but is preferably the following general formula [2] or [3], more preferably [2]. In the formulas [2] and [3], q and r are integers of 1 to 20.
- composition ratio of the unit having a primary amino group contained in the polymer compound of the present invention is preferably 1 to 94 mol% with respect to all units of the polymer. It is preferably 2 to 90 mol%, most preferably 20 to 40 mol%. If the composition value falls below the lower limit, a sufficient amount of glycopeptide cannot be immobilized. Moreover, when it exceeds an upper limit, nonspecific adsorption
- the hydrophilic unit contained in the polymer compound is typified by a phosphorylcholine group, and the structure is not particularly limited.
- the unit of the general formula [1] is represented by a structural unit on the left side of the structural unit.
- a structure in which a (meth) acrylic residue and a phosphorylcholine group are bonded via a chain of an alkyleneoxy group X having 1 to 10 carbon atoms is most preferable.
- X is most preferably an ethyleneoxy group.
- the number of repeating alkyleneoxy groups is an integer of 1 to 20, and when the number of repeating is 2 or more and 20 or less, the carbon number of the alkyleneoxy group to be repeated may be the same or different.
- l is naturally a natural number, it may be expressed as a composition ratio of each component.
- the composition ratio of the unit having a phosphorylcholine group contained in the polymer compound is preferably 5 to 98 mol%, more preferably 10 to 10%, based on all units of the polymer. 80 mol%, most preferably 10 to 80 mol%.
- the composition ratio is below the lower limit, the hydrophilicity becomes weak and non-specific adsorption increases.
- the upper limit is exceeded, water solubility increases, and the polymer compound may be eluted during the assay.
- the unit having a hydrophobic group contained in the polymer compound of the present invention is not particularly limited in structure.
- (meth) acrylic A structure in which a hydrophobic group is bonded to a group residue is preferable.
- a hydrophobic group is not specifically limited, An alkyl group and aromatics are mentioned. More preferably, the alkyl group is an alkyl group having 2 to 10 carbon atoms.
- the structure of the alkyl group is not particularly limited, and may be linear, branched, or cyclic.
- m is naturally a natural number, but may be expressed as a composition ratio of each component.
- composition ratio of the unit having a hydrophobic group contained in the polymer compound is preferably 10 to 90 mol%, more preferably, relative to all units of the polymer. It is 10 to 80 mol%, and most preferably 20 to 80 mol%. If the upper limit is exceeded, non-specific adsorption may increase.
- the method for synthesizing the polymer compound of the present invention is not particularly limited, but from the viewpoint of ease of synthesis, a monomer in which at least a primary amino group is previously protected with a protecting group, a monomer having a phosphorylcholine group, and a hydrophobic group are added.
- a production method comprising a step of radical copolymerizing a monomer having the above and a step of removing a protecting group from the polymer compound obtained by the above step is preferred.
- a step of radical copolymerization of a monomer having a functional group capable of introducing at least a primary amino group, a monomer having a phosphorylcholine group, and a monomer having a hydrophobic group, and the polymer compound obtained by the above step with a primary amino group is preferable.
- the monomer in which the primary amino group is previously protected with a protecting group is not particularly limited in structure, but the following general formula [4] (wherein R3 is a hydrogen atom or a methyl group, Y is a spacer containing an alkylene glycol residue, Z Is a structure in which a (meth) acrylic group and an oxylamino group or a hydrazide group are interposed via a spacer Y containing an alkylene glycol residue. It is preferable.
- Protecting group W is not limited as long as it can protect an amino group, and can be arbitrarily used. Of these, t-butoxycarbonyl group (Boc group), benzyloxycarbonyl group (Z group, Cbz group), 9-fluorenylmethoxycarbonyl group (Fmoc group) and the like are preferably used.
- Deprotection can be performed under general conditions by using trifluoroacetic acid, hydrochloric acid, or anhydrous hydrogen fluoride.
- the monomer having a phosphorylcholine group is not particularly limited in structure.
- Examples include meth) acryloyloxyethoxynonyl phosphorylcholine, 2- (meth) acryloyloxypropyl phosphorylcholine, and 2-methacryloyloxyethyl phosphorylcholine is preferable from the viewpoint of availability.
- the monomer having a hydrophobic group examples include n-butyl (meth) acrylate, iso-butyl (meth) acrylate, sec-butyl (meth) acrylate, t-butyl (meth) acrylate, n-neopentyl ( (Meth) acrylate, iso-neopentyl (meth) acrylate, sec-neopentyl (meth) acrylate, neopentyl (meth) acrylate, cyclohexyl (meth) acrylate, n-hexyl (meth) acrylate, iso-hexyl (meth) acrylate, heptyl ( (Meth) acrylate, n-octyl (meth) acrylate, iso-octyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, n-nonyl (meth)
- the method for introducing a primary amino group after polymerizing a polymer compound is not limited at all, but at least a monomer having a phosphorylcholine group, a monomer having a hydrophobic group, and a monomer having an alkoxy group are radicalized.
- a method of producing a hydrazide group by reacting an alkoxy group introduced into the polymer compound with hydrazine after copolymerization is preferred.
- the alkoxy group a methoxy group, an ethoxy group, a propoxy group, a t-butoxy group and the like are preferable.
- the synthetic solvent for the polymer compound of the present invention is not particularly limited as long as each monomer can be dissolved.
- alcohols such as methanol, ethanol, isopropanol, n-butanol, t-butyl alcohol, and n-pentanol, Benzene, toluene, tetrahydrofuran, dioxane, dichloromethane, chloroform, cyclohexanone, N, N-dimethylformamide, dimethyl sulfoxide, methyl acetate, ethyl acetate, butyl acetate, methyl ethyl ketone, methyl butyl ketone, ethylene glycol monoethyl ether, ethylene glycol monomethyl ether, Examples include ethylene glycol monobutyl ether. These solvents are used alone or in combination of two or more.
- the polymerization initiator may be any ordinary radical initiator such as 2,2′-azobisisobutylnitrile (hereinafter also referred to as “AIBN”), 1,1′-azobis (cyclohexane-1-carbonitrile), and the like. And organic peroxides such as benzoyl peroxide and lauryl peroxide.
- AIBN 2,2′-azobisisobutylnitrile
- 1,1′-azobis cyclohexane-1-carbonitrile
- organic peroxides such as benzoyl peroxide and lauryl peroxide.
- the molecular weight of the polymer compound of the present invention is preferably 5,000 or more, more preferably 10,000 or more, because separation and purification of the polymer compound and unreacted monomer are facilitated.
- Deprotection can be performed under general conditions using the above-described trifluoroacetic acid, hydrochloric acid, and anhydrous hydrogen fluoride, but the timing of deprotection is as follows.
- the polymerization is generally completed and the polymer compound is prepared, and the polymer compound can be obtained by deprotection after the polymerization.
- the present invention it is possible to easily impart the property of suppressing non-specific adsorption of glycopeptide and the property of immobilizing glycopeptide by coating the surface of the substrate with the polymer compound. .
- a known method such as preparing a polymer solution in which a polymer compound is dissolved in an organic solvent so as to have a concentration of 0.05 to 50% by weight, and dipping or spraying. After coating on the surface of the substrate, drying is performed at room temperature or under heating.
- Organic solvents include alcohols such as ethanol, methanol, isopropanol, n-butanol, t-butyl alcohol, n-pentanol, cyclohexanol, benzene, toluene, tetrahydrofuran, dioxane, dichloromethane, chloroform, acetone, methyl acetate, ethyl acetate Butyl acetate, methyl ethyl ketone, methyl butyl ketone, ethylene glycol monoethyl ether, ethylene glycol monomethyl ether, ethylene glycol monobutyl ether, cyclohexanone, and the like.
- alcohols such as ethanol, methanol, isopropanol, n-butanol, t-butyl alcohol, n-pentanol, cyclohexanol, benzene, toluene, tetrahydrofuran
- alcohols such as ethanol, methanol, isopropanol, n-butanol, t-butyl alcohol, and n-pentanol cyclohexanol are preferable because they do not denature the plastic substrate and can be easily dried.
- the base material used in the present invention is preferably a slide-shaped substrate, a 96-well plate, a container, or a microfluidic substrate.
- a plastic substrate examples thereof include a plastic substrate, a glass substrate, and a substrate having a metal vapor deposition film.
- the plastic substrate include substrates made of polystyrene, cyclic polyolefin polymer, cycloolefin polymer, polypropylene, polyethylene, polysulfone, polyimide, polycarbonate, and polymethyl methacrylate.
- a base material used for fluorescence observation a cyclic polyolefin polymer and a cycloolefin polymer are useful.
- the hydrophobic group of the polymer compound is a cyclohexyl group
- the interaction with the base material is good, and a polymer material having the same composition ratio is used as another base material (for example, polystyrene or Compared with the case of application to a glass substrate)
- the adsorption amount is high and the background value is low.
- the polymer compound when applied to the cyclic polyolefin polymer, it cannot be applied to a polymer compound having 100 mol% aminooxy monomer. On the other hand, it can be applied to polystyrene polymer, but non-specific adsorption of impurities is not suppressed and is not versatile.
- Examples of the method for immobilizing the glycopeptide on the base material include a method of spotting a solution in which the glycopeptide is dissolved using a spotter, a method in which the solution in which the glycopeptide is dissolved is dispensed into a container, etc. There is.
- Various buffer materials are suitably used as the solution for dissolving the glycopeptide.
- sodium carbonate, sodium bicarbonate, potassium phosphate, dipotassium hydrogen phosphate, Tris hydrochloride buffer, Tris acetate buffer, PBS buffer, sodium citrate, sodium acetate, HEPES (N-2- Hydroxyethylpiperazine-N'-ethanesulfonic acid) buffer, MOPS (3- (N-morpholino) propanesulfonic acid) buffer, and the like are used.
- the pH of the solution is preferably 2-8.
- the concentration of the glycopeptide in the solution is not particularly limited, but is preferably 0.0001 mg / ml to 10 mg / ml.
- the temperature at which the glycopeptide solution is immobilized is preferably 0 ° C to 100 ° C.
- the present invention also relates to a method for using the glycopeptide array thus prepared, wherein a detection target substance is brought into contact with the glycopeptide in the array, and the binding between the glycopeptide and the detection target substance is detected.
- a method comprising the steps is also provided.
- the detection target substance may be labeled as necessary.
- the label is not particularly limited as long as it is detectable.
- a fluorescent dye, a radioactive substance, a chemiluminescent substance, an enzyme, and a coenzyme can be used.
- the present invention also relates to a method for using the glycopeptide array thus prepared, wherein a test material is brought into contact with the glycopeptide in the array, and the binding between the glycopeptide and the test material is detected. Thereby detecting that the test material has the ability to bind to the glycopeptide, or contacting the test material with the glycopeptide in the array and detecting the binding between the glycopeptide and the test material.
- the test material may be labeled as necessary.
- the label is not particularly limited as long as it is detectable.
- a fluorescent dye, a radioactive substance, a chemiluminescent substance, an enzyme, and a coenzyme can be used.
- fluorescein, rhodamine, dansyl chloride examples include luciferase, radioisotope, peroxidase, alkaline phosphatase, lysozyme, and biotin / avidin.
- Sequence 1 5-oxo linker-GVTSAPD T RPAPG ST APPAHGVT-NH 2 / SEQ ID NO: 1
- Sequence 2 5-oxo linker-STAPPAHGVTGV TS APD T RPAPGSTA-NH 2 / SEQ ID NO: 2
- Monosaccharide N-acetylgalactosamine (Tn) disaccharide at the hydroxyl groups of threonine (T) and serine (S) at positions 8, 14, 15 from the 5-oxyhexanoyl side introduced at the N (amino) end of sequence 1
- Galactose-N-acetylgalactosamine T: Gal ⁇ 1 ⁇ 3GalNAc
- Trisaccharide N-acetylneuraminic acid-galactose-N-acetylgalactosamine Sialyl-T: NeuAc ⁇ 2 ⁇ 3Gal ⁇ 1 ⁇ 3GalNAc
- the monosaccharide N-acetylgalactosamine (Tn) is added to the hydroxyl groups of threonine (T) and serine (S) at positions 13, 14, 18 from the 5-oxyhexanoyl side introduced at the N (amino) terminus of sequence 2.
- T Gal ⁇ 1 ⁇ 3GalNAc
- Sialyl-T NeuAc ⁇ 2 ⁇ 3Gal ⁇ 1 ⁇ 3GalNAc
- Example 2 Synthesis of polymer (1) Synthesis of polymer compound 2-methacryloyloxyethyl phosphorylcholine (MPC), n-butyl methacrylate (BMA), N- [2- [2- [2- (t-butoxycarbonyl] Aminooxyacetylamino) ethoxy] ethoxy] ethyl] -methacrylamide (OA, a compound represented by the formula [5]) in order of 0.25 mol / L, 0.55 mol / L, and 0.20 mol / L, respectively.
- a monomer mixed solution was prepared by dissolving in ethanol. Further AIBN was added to 0.01 mol / L, and the mixture was stirred until uniform.
- a solid phase substrate was prepared by processing 100% and a heat distortion temperature of 123 ° C. into a slide glass shape (dimensions: 75 mm ⁇ 25 mm ⁇ 1 mm).
- This solid phase substrate was obtained by using 2-methacryloyloxyethyl phosphorylcholine (MPC), n-butyl methacrylate (BMA), N- [2- [2- [2- (t-butoxycarbonylaminooxyacetylamino) ethoxy] ethoxy] ethyl. ]
- MPC 2-methacryloyloxyethyl phosphorylcholine
- BMA n-butyl methacrylate
- a polymer of methacrylamide (OA) (each group is 26: 66: 8 in mol%) is immersed in a 0.3 wt% ethanol solution and dried to contain the above polymer substance on the substrate surface. Layer was introduced.
- Example 3 Preparation of MUC1 Glycopeptide Array A solution prepared by adjusting the glycopeptide obtained above to a concentration of 0.5 mM in 0.5 M acetate buffer was used as shown in FIG. And then left to stand at 80 ° C. for 1 hour for immobilization. After immobilization, washing with ultrapure water was performed.
- MUC1 glycopeptide array was measured by the following method.
- a solution of 6 types of anti-MUC1 monoclonal antibodies (VU-3D1, Ma552, VU-12E1, VU11E2, SM2, and VU-3C6) was dispensed at 100 ⁇ L to each spot, and reacted at room temperature for 1 hour. After the reaction, it was washed 5 times with the following washing solution.
- Washing solution 50 mM Tris.HCl (pH 7.5), 100 mM NaCl, 1 mM CaCl 2 , MnCl 2 , MgCl 2 , 0.05% Triton X-100 (all reagents are manufactured by Wako Pure Chemical Industries)
- 100 ⁇ L of 1 ⁇ g / mL Cy3-Labeled Goat Anti-Mouse IgG (H + L) was dispensed to each spot and allowed to react at room temperature for 1 hour. After the reaction, it was washed 5 times with the above washing solution.
- Solvent 50 mM Tris.HCl (pH 7.5), 100 mM NaCl, 1 mM CaCl 2 , MnCl 2 , MgCl 2 , 0.05% Tween 20 (all reagents are manufactured by Wako Pure Chemical Industries, Ltd.) 100 ⁇ L was dispensed into each well and reacted at room temperature for 2 hours. After the reaction, the inside of the well was washed three times with the following washing solution.
- Washing solution 50 mM Tris.HCl (pH 7.5), 100 mM NaCl, 1 mM CaCl 2 , MnCl 2 , MgCl 2 , 0.05% Triton X-100 (all reagents are manufactured by Wako Pure Chemical Industries) Peroxidase-labeled avidin (MP Biomedicals, 191370) was prepared to 0.5 ⁇ g / mL with the following solvent.
- Solvent 50 mM Tris.HCl (pH 7.5), 100 mM NaCl, 1 mM CaCl 2 , MnCl 2 , MgCl 2 , 0.05% Tween 20 (all reagents are manufactured by Wako Pure Chemical Industries, Ltd.).
- a peroxidase solution (100 ⁇ L) was dispensed into the 96-well plate on which the lactose had been immobilized, and reacted at room temperature for 1 hour. After completion of the reaction, each well was washed three times with a washing solution.
- the color was measured for 15 minutes using a peroxidase coloring kit (manufactured by Sumitomo Bakelite, ML-1120T), and then measured with a microplate reader (Infinit 200 manufactured by TECAN). Absorbance at 450 nm was measured.
- ⁇ Reference Example 2 Structure comparison of hydrophobic residues (background comparison, 96-well plate)
- the 96-well microplate made of cyclic polyolefin (Sumitomo Bakelite Co., Ltd.) used in Reference Example 1 was used.
- a polymer compound synthesized by replacing butyl methacrylate of the sugar chain-trapping polymer compound of Reference Example 1 with cyclohexyl methacrylate or n-hexyl methacrylate was applied in the same manner as in Reference Example 1 to deprotect the Boc group.
- Biotin-labeled RCA120 lectin was reacted, and peroxidase-labeled avidin was further reacted. Then, it developed with the peroxidase coloring kit, and the light absorbency was measured.
- a low background value was also obtained for a butyl group and an n-hexyl group, which are linear alkyl groups, but a lower background value was obtained for a cyclohexyl group, which is a cyclic alkyl group.
- ⁇ Reference Example 3 Structure comparison of hydrophobic residues (signal value comparison, 96-well plate)
- the cyclic polyolefin 96-well microplate (Sumitomo Bakelite Co., Ltd.) used in Reference Examples 1 and 2 was used.
- a polymer compound synthesized by replacing butyl methacrylate of the sugar chain-trapping polymer compound of Reference Example 1 with cyclohexyl methacrylate was applied in the same manner as in Reference Example 1 to deprotect the Boc group.
- Sugar chain immobilization Mannotriose (Dextra, M336) was prepared to 10 ⁇ g / mL using the following solvent. 100 ⁇ L was dispensed into each well of a 96-well plate and reacted at 80 ° C. for 1 hour.
- Solvent 50 mM Tris ⁇ HCl (pH 7.5), 100 mM NaCl, 1 mM CaCl 2 , MnCl 2 , MgCl 2 , 0.05% Tween20.
- Washing solution 50mM Tris ⁇ HCl (pH7.5) , 100mM NaCl, 1mM CaCl 2, MnCl 2, MgCl 2, 0.05% TritonX-100 Peroxidase-labeled avidin (MP Biomedicals, 191370) was prepared to 0.5 ⁇ g / mL with the following solvent.
- Solvent 50 mM Tris.HCl (pH 7.5), 100 mM NaCl, 1 mM CaCl 2 , MnCl 2 , MgCl 2 , 0.05% Tween20.
- a peroxidase solution (100 ⁇ L) was dispensed into the 96-well plate on which the lactose had been immobilized, and reacted at room temperature for 1 hour. After completion of the reaction, each well was washed three times with a washing solution. In measuring the amount of peroxidase immobilized on the solid phase, the color was developed with TMB (Bio-Rad, 172-1067) for 15 minutes, and the absorbance was measured at 450 nm.
- TMB Bio-Rad, 172-1067
- a high absorbance value could be obtained for a cyclohexyl group which is a cyclic alkyl group.
- the glycopeptide array of the present invention it is possible to efficiently detect the interaction between the substance to be detected and the glycopeptide. Since glycopeptides are closely related to many life phenomena and pathologies such as cancer and infectious diseases, the glycopeptide arrays of the present invention can greatly contribute to the development of new diagnostic methods and therapeutic methods, for example. It is.
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Abstract
Description
(1) 糖ペプチドが基材に固定化されている糖ペプチドのアレイであって、糖ペプチドは、そのペプチド部分にカルボニル基を有する分子が結合されており、基材は、一級アミノ基を有するユニットを含む高分子化合物で被覆されており、前記カルボニル基と前記一級アミノ基の結合により、糖ペプチドが基材に固定化されているアレイ。
(2) 基材における高分子化合物が、さらに、ホスホリルコリン基を有するユニットおよび疎水性基を有するユニットを含む、(1)に記載のアレイ。
(3) 高分子化合物が、下記一般式〔1〕で表されるものである、(2)に記載のアレイ。
(4) 一般式〔1〕において、Yが下記一般式〔2〕又は〔3〕である、(3)に記載のアレイ。
(5) 高分子化合物における一級アミノ基が、オキシルアミノ基および/またはヒドラジド基である、(1)から(4)のいずれかに記載のアレイ。
(6) 高分子化合物における一級アミノ基を有するユニットの含有量が、高分子化合物の全ユニットの20mol%以上、40mol%以下である、(1)から(5)のいずれかに記載のアレイ。
(7) 一般式〔1〕において、Xがエチレンオキシ基である、(3)に記載のアレイ。
(8) 高分子化合物の主鎖が(メタ)アクリル骨格である、(1)~(7)のいずれか記載のアレイ。
(9) 疎水性基R4が炭素数2~10のアルキル基である、(3)に記載のアレイ。
(10) 疎水性基R4が環状アルキル基である、(9)に記載のアレイ。
(11) 環状アルキル基がシクロヘキシル基である、(10)に記載のアレイ。
(12) (1)から(11)のいずれかに記載のアレイの使用方法であって、前記アレイにおける糖ペプチドに検出対象物質を接触させ、前記糖ペプチドと前記検出対象物質との結合を検出する工程を含む方法。
(13) (1)から(11)のいずれかに記載のアレイの使用方法であって、前記アレイにおける糖ペプチドに被検材料を接触させ、前記糖ペプチドと前記被検材料との結合を検出することにより、前記被検材料が前記糖ペプチドと結合する能力を有することを検出する方法。
(14) (1)から(11)のいずれかに記載のアレイの使用方法であって、前記アレイにおける糖ペプチドに被検材料を接触させ、前記糖ペプチドと前記被検材料との結合を検出することにより、前記被検材料中に前記糖ペプチドと結合する能力を有する物質が存在することを検出する方法。
また、本発明は、このようにして作製された糖ペプチドアレイの使用方法であって、前記アレイにおける糖ペプチドに被検材料を接触させ、前記糖ペプチドと前記被検材料との結合を検出することにより、前記被検材料が前記糖ペプチドと結合する能力を有することを検出する方法や、前記アレイにおける糖ペプチドに被検材料を接触させ、前記糖ペプチドと前記被検材料との結合を検出することにより、前記被検材料中に前記糖ペプチドと結合する能力を有する物質が存在することを検出する方法をも提供する。前記結合の検出のため、前記被検材料は、必要に応じて標識されていてもよい。標識としては検出可能であれば特に制限はないが、例えば、蛍光色素、放射性物質、化学発光物質、酵素、補酵素を用いることが可能であり、具体的には、フルオレセイン、ローダミン、ダンシルクロリド、ルシフェラーゼ、ラジオアイソトープ、ペルオキシダーゼ、アルカリフォスファターゼ、リゾチーム、ビオチン/アビジンなどが挙げられる。
以下のアミノ配列のオリゴペプチドを、文献(特開2006-63055号公報)に記載の方法に従って合成した。
配列2:5-oxo linker-STAPPAHGVTGVTSAPDTRPAPGSTA-NH2/配列番号:2
配列1のN(アミノ)末端に導入された5-oxyhexanoyl側から8、14、15位のトレオニン(T)およびセリン(S)の水酸基に、単糖のN-アセチルガラクトサミン(Tn)、二糖のガラクトース-N-アセチルガラクトサミン(T:Galβ1→3GalNAc)、三糖のN-アセチルノイラミン酸-ガラクトース-N-アセチルガラクトサミン(Sialyl-T:NeuAcα2→3Galβ1→3GalNAc)を結合し、下記表1に記載の化合物を作製した。
(1) 高分子化合物の合成
2-メタクリロイルオキシエチルホスホリルコリン(MPC)、n-ブチルメタクリレート(BMA)、N-[2-[2-[2-(t-ブトキシカルボニルアミノオキシアセチルアミノ)エトキシ]エトキシ]エチル]-メタクリルアミド(OA、式[5]で示した化合物)をそれぞれ順に0.25mol/L、0.55mol/L、0.20mol/Lになるようにエタノールに溶解させ、モノマー混合溶液を作製した。そこにさらにAIBNを0.01mol/Lになるように添加し、均一になるまで撹拌した。その後、アルゴンガス雰囲気下、60℃で6時間反応させた後、反応溶液をジエチルエーテル中に滴下し、沈殿を回収した。得られた高分子化合物を1H―NMRで測定し、この高分子化合物の組成比を算出した。表2に結果を示した。
前記高分子化合物を2NのHCl-ジオキサン-エタノール溶液で室温4時間処理することにより、BOC基の除去を行った。脱保護後の高分子化合物の1H―NMR測定を行い、BOC基のトリメチルに起因するピークが消失していることより脱保護を確認した。
飽和環状ポリオレフィン樹脂(5-メチル-2-ノルボルネンの開環重合体の水素添加物、MFR(Melt flow rate):21g/10分、水素添加率:実質的に100%、熱変形温度123℃)をスライドガラス形状(寸法:75mm×25mm×1mm)に加工して固相基板を作成した。この固相基板を前期2-メタクリロイルオキシエチルホスホリルコリン(MPC)、n-ブチルメタクリレート(BMA)、N-[2-[2-[2-(t-ブトキシカルボニルアミノオキシアセチルアミノ)エトキシ]エトキシ]エチル]-メタクリルアミド(OA)の共重合体(各基はモル%で26:66:8)の0.3重量%エタノール溶液に浸漬し、乾燥することにより、基板表面に上記高分子物質を含む層を導入した。
前記で得られた糖ペプチドを0.5Mの酢酸バッファー中に0.5mMの濃度になるように調製した溶液を、自動スポッターを用いて図1のようにスポットし、80℃で1時間静置して固定化した。固定化後、超純水による洗浄を行った。
前記MUC1糖ペプチドアレイを以下の方法で測定した。6種類の抗MUC1モノクローナル抗体(VU-3D1、Ma552、VU-12E1、VU11E2,SM2、VU-3C6)の溶液を、各スポット部分に100μL分注し、室温で1時間反応させた。反応後、下記の洗浄液で5回洗浄した。
次に、1μg/mLのCy3-Labeled Goat Anti-Mouse IgG(H+L)を各スポットに100μL分注し、室温で1時間反応させた。反応後、上記の洗浄液で5回洗浄した。
(1)糖鎖捕捉基材の作製
糖鎖捕捉高分子材料を表面に形成させる基材として、96ウェルプレートを使用した。前記96ウェルプレートは住友ベークライトにおいて環状ポリオレフィン樹脂で成形したものを使用した。
糖鎖捕捉高分子化合物として2-メタクリロイルオキシエチルホスホリルコリン-ブチルメタクリレート-N-[2-[2-[2-(t-ブトキシカルボニルアミノオキシ-アセチルアミノ)エトキシ]エトキシ]エチル]-メタクリルアミド共重合体を用い、前記高分子化合物の1.0重量%エタノール溶液150uLを96ウェルプレートの各ウェルに分注して30分静置した後に溶液を抜き取り乾燥させ、溶媒を蒸散させて基材表面に塗布した。高分子化合物として、アミノオキシ基の含有量が14、16、20%の3種類を合成し、用いた。乾燥後、2M HClを分注し、37℃で2時間処理してBoc基を脱保護し糖鎖捕捉高分子化合物を表面に持つ96ウェルプレートを作製した。
(2)糖鎖固定化
二糖のラクトース(和光純薬、124-00092)を300mMの酢酸ナトリウムバッファー(pH4.0)で1mg/mLに調製し、ラクトース溶液を作製した。作製したラクトース溶液を、前記の糖鎖捕捉用96ウェルプレートに200μL分注し、65℃で16時間反応させた。反応後、溶媒で未反応ラクトースを除去した。
(3)固定糖鎖の検出
ラクトースと特異的に反応するRCA120レクチンをビオチン標識したもの(Biotin標識RCA120レクチン(Vector社製、B-1085))を下記の溶媒で0.5μg/mLに調製した。
各ウェルに100μLづつ分注して室温で2時間反応させた。反応後、下記洗浄液で3回、ウェル内を洗浄した。
ペルオキシダーゼ標識アビジン(MP Biomedicals社製、191370)を下記の溶媒で0.5μg/mLに調製した。
参考例1で用いた環状ポリオレフィン製96ウェルマイクロプレート(住友ベークライト社製)を使用した。参考例1の糖鎖捕捉高分子化合物のブチルメタクリレートを、シクロヘキシルメタクリレートまたはn-ヘキシルメタクリレートに代えて合成した高分子化合物を参考例1と同様の方法で塗布し、Boc基を脱保護した。Biotin標識RCA120レクチンを反応させ、さらにペルオキシダーゼ標識アビジンを反応させた。その後、ペルオキダーゼ発色キットで発色させ、吸光度を測定した。
参考例1、2で用いた環状ポリオレフィン製96ウェルマイクロプレート(住友ベークライト社製)を使用した。参考例1の糖鎖捕捉高分子化合物のブチルメタクリレートをシクロヘキシルメタクリレートに代えて合成した高分子化合物を、参考例1と同様の方法で塗布し、Boc基を脱保護した。
(1)糖鎖固定化
マンノトリオース(Dextra、M336)を下記の溶媒を用いて10μg/mLに調製した。96ウェルプレートの各ウェルに100μLづつ分注し、80℃、1時間反応させた。
反応終了後、洗浄して未反応のマンノトリオースを除去した。
(2)固定糖鎖の検出
マンノトリオースと特異的に反応するBiotin標識ConAレクチン(SIGMA社製、C2272)を下記の溶媒で250ng/mLに調製した。
ペルオキシダーゼ標識アビジン(MP Biomedicals社製、191370)を下記の溶媒で0.5μg/mLに調製した。
<223> 人工的に合成されたペプチドの配列
Claims (14)
- 糖ペプチドが基材に固定化されている糖ペプチドのアレイであって、糖ペプチドは、そのペプチド部分にカルボニル基を有する分子が結合されており、基材は、一級アミノ基を有するユニットを含む高分子化合物で被覆されており、前記カルボニル基と前記一級アミノ基の結合により、糖ペプチドが基材に固定化されているアレイ。
- 基材における高分子化合物が、さらに、ホスホリルコリン基を有するユニットおよび疎水性基を有するユニットを含む、請求項1に記載のアレイ。
- 高分子化合物における一級アミノ基が、オキシルアミノ基および/またはヒドラジド基である、請求項2から4のいずれかに記載のアレイ。
- 高分子化合物における一級アミノ基を有するユニットの含有量が、高分子化合物の全ユニットの20mol%以上、40mol%以下である、請求項5に記載のアレイ。
- 一般式〔1〕において、Xがエチレンオキシ基である、請求項3に記載のアレイ。
- 高分子化合物の主鎖が(メタ)アクリル骨格である、請求項1~7いずれか記載のアレイ。
- 疎水性基R4が炭素数2~10のアルキル基である、請求項3に記載のアレイ。
- 疎水性基R4が環状アルキル基である、請求項9に記載のアレイ。
- 環状アルキル基がシクロヘキシル基である、請求項10に記載のアレイ。
- 請求項1から11のいずれかに記載のアレイの使用方法であって、前記アレイにおける糖ペプチドに検出対象物質を接触させ、前記糖ペプチドと前記検出対象物質との結合を検出する工程を含む方法。
- 請求項1から11のいずれかに記載のアレイの使用方法であって、前記アレイにおける糖ペプチドに被検材料を接触させ、前記糖ペプチドと前記被検材料との結合を検出することにより、前記被検材料が前記糖ペプチドと結合する能力を有することを検出する方法。
- 請求項1から11のいずれかに記載のアレイの使用方法であって、前記アレイにおける糖ペプチドに被検材料を接触させ、前記糖ペプチドと前記被検材料との結合を検出することにより、前記被検材料中に前記糖ペプチドと結合する能力を有する物質が存在することを検出する方法。
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| WO2018117242A1 (ja) * | 2016-12-22 | 2018-06-28 | 日本ゼオン株式会社 | オリゴペプチドの探索方法、オリゴペプチド、修飾ペプチド、及び免疫測定方法 |
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| TAKAHIKO MATSUSHITA ET AL.: "Shikkan Tokuiteki Epitope Tansaku o Shiko shita MUC1 To Peptide Microarray no Kaihatsu", DAI 30 KAI THE JAPANESE SOCIETY OF CARBOHYDRATE RESEARCH NENKAI YOSHISHU, vol. SHIKKAN, 27 June 2011 (2011-06-27), pages 75, XP008168150 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018117242A1 (ja) * | 2016-12-22 | 2018-06-28 | 日本ゼオン株式会社 | オリゴペプチドの探索方法、オリゴペプチド、修飾ペプチド、及び免疫測定方法 |
| JPWO2018117242A1 (ja) * | 2016-12-22 | 2019-10-31 | 日本ゼオン株式会社 | オリゴペプチドの探索方法、オリゴペプチド、修飾ペプチド、及び免疫測定方法 |
| JP7024730B2 (ja) | 2016-12-22 | 2022-02-24 | 日本ゼオン株式会社 | オリゴペプチドの探索方法、オリゴペプチド、修飾ペプチド、及び免疫測定方法 |
| US11485757B2 (en) | 2016-12-22 | 2022-11-01 | Zeon Corporation | Oligopeptide search method, oligopeptide, modified peptide, and immunoassay method |
| US11926679B2 (en) | 2016-12-22 | 2024-03-12 | Zeon Corporation | Oligopeptide search method, oligopeptide, modified peptide, and immunoassay method |
| US12509489B2 (en) | 2016-12-22 | 2025-12-30 | Zeon Corporation | Oligopeptide |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2012070564A1 (ja) | 2014-05-19 |
| US20130316932A1 (en) | 2013-11-28 |
| EP2645103A1 (en) | 2013-10-02 |
| EP2645103A4 (en) | 2014-04-30 |
| JP5958911B2 (ja) | 2016-08-02 |
| EP2645103B1 (en) | 2016-03-23 |
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